package com.ljfiction.book.http;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * Created by Administrator on 2016/6/12.
 */
public class Md5 {

    /**
     * 关于Md5加密方法
     *
     * @param plainText
     * @return
     */
    public static String encryption(String plainText) {
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(plainText.getBytes());
            byte b[] = md.digest();
            int i;
            StringBuffer buf = new StringBuffer("");
            for (int offset = 0; offset < b.length; offset++) {
                i = b[offset];
                if (i < 0)
                    i += 256;
                if (i < 16)
                    buf.append("0");
                buf.append(Integer.toHexString(i));
            }
            return buf.toString();//32位
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return "";
    }
}
